Suppressing and restoring the Dicke superradiance transition by dephasing and decay
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We show that dephasing of individual atoms destroys the superradiance transition of the Dicke model, but that adding individual decay toward the spin down state can restore this transition. To demonstrate this, we present a method to give an exact solution for the N atom problem with individual dephasing which scales polynomially with N. By comparing finite size scaling of our exact solution to a cumulant expansion, we confirm the destruction and restoration of the superradiance transition holds in the thermodynamic limit.
Kirton , P & Keeling , J 2017 , ' Suppressing and restoring the Dicke superradiance transition by dephasing and decay ' Physical Review Letters , vol 118 , no. 12 , 123602 . DOI: 10.1103/PhysRevLett.118.123602
Physical Review Letters
© 2017, American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at journals.aps.org/prl / https://doi.org/10.1103/PhysRevLett.118.123602
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